I realize it's old news and that it has been discussed but i jumped over to the witches cottage and was amazed it had the same limit.
This is old news and has been discussed quite a bit. The problem is the variety of sizes of homes within a category. Ald Velothi Harbor House and Velothi Reverie are also medium homes (200/400 slots) and are pretty close to the same size as Lucky Cat. And yes, my spouse measured VR and LC, and LC was only slightly larger. In fact, the entire interior of LC is the same size as VR exterior.
It's unfortunate that while there are a variety of sizes within a category, and gold/crown prices reflect these relative sizes, they all get the same item limit.
How on earth can this house have the same item max as the exorcised witches cottage? Lucky cat consists of much more than a thatched hut on a piece of swampland?